BS EN ISO 21061:2021 pdf free download – Footwear一Chemical tests一General principles on the preparation of samples.
5 Preparation of samples
5.1 General
The preparation of samples shall be in accordance with the generic flowchart for preparing samples in Figure B.1.
5.2 Photo and identification of material classification
Photos should be taken before disassembling the footwear for sample identification purpose.
When necessary, the footwear should be documented with 4 photos: 1 from above, 1 from each side and
1 from underneath.
Using the document of the footwear manufacturer or visually, all different materials of the footwear
which are required to be tested, shall be identified and assigned a material classification (see Annex C).
If possible at this stage, for each material classification, list all the different raw materials (for example,
Table I can be used).
5.3 Disassembling of footwear
Dismantle the footwear and separate all the materials required for chemical testing and register them, for example completing Table 1.
tach test sample shall be separated as cleanly as possible in order to avoid any chemical contamination that could affect the final result.
lithe laboratory does not or cannot remove the adhesives from the materials, it shall be specified in the Table 1 (column “useful information”).
5.4 Testing schedule
Taking into account the list of test samples, the customer restricted substances list (RSL) (or ISO/TR 16178) and the customer order, the testing schedule is created. An example of the testing schedule is given in Table 2. for all materials identified in Table I.
Taking into account all the test methods to be performed, the necessary quantity for each test sample is determined.
Composite test samples may he tested if it is not forbidden by the test method.
NOTE The constitution of a composite test sample is a technical decision depending on the performance of the laboratory (limit of quantification, uncertainty of measurement). The results obtained from the composite test samples will permit a decision on the conformity of each single test sample of the composite test sample.
5.5 Sampling
The sampling procedure is applied as is specified in each test standard. For example, for leather material, Iso 4044 shall apply.
All test samples shall be taken from the same footwear.
If the amount of test samples is insufficient to perform all the required tests, then samples from further available footwear of the same model and production batch shall be taken. If the amount of test samples is still insufficient additional samples shall be requested.
If additional samples are not available, a choice shall be made to give a priority to the most critical substances (carcinogenic, mutagenic, toxic for reproduction). The customer and the laboratory shall agree on this list.
If the same material is used in several components of the footwear, the sample for test shall be representative proportionally of all the component.
5.6 Storage and conditioning
The samples shall be stored at room temperature in a clean, dry condition and protected from contamination.
If the test method requires storage under specific conditions they shall be applied and the tests shall be conducted in accordance to the specific requirements of the applicable standard.